Tektronix TDS5054, Руководство пользователя

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Measuring Waveforms
TDS5000 Series User Manual
3- 125
To use cursors, simply move the cursors on screen and read the results in the cursor
readouts. The following key points will help you use the cursors effectively.
Cursor Types.
The cursor types are described in Table 3--8 on page 3--124. There
are two cursors displayed for all types, Cursor 1 and Cursor 2. You can move
cursors with the multipurpose knobs or the cursor position controls in the Cursor
Setup control window, or click and drag them to a new location.
Cursors are Limited by the Display.
You cannot move a cursor off the screen. Also,
if you resize waveforms, the cursors do not track. That is, a cursor stays at its
screen position, ignoring changes to horizontal and vertical scale and position
and vertical offset (paired and split cursors will track a waveform vertically).
Cursors Ignore the Selected Waveform. Each cursor measures its source, defined
in the Cursor Setup control window. Selecting a waveform for scaling on screen
(by pushing the CH 3 front-panel button, for example) does not change the
source that each cursor measures.
After you have selected the source from the Cursor Setup control window, you
can operate the cursor from the front-panel knobs and buttons.
NOTE
. If a cursor readout does not seem correct, check the source of each cursor
in the Cursor Setup dialog box. Each cursor readout relates to the amplitude and
timebase settings of its source.
Vertical Cursors Measure from the Trigger Point.
Remember that each vertical
cursor measures the time from the trigger point to itself. This relationship is
shown in Figure 3--35 on page 3--126.
Using Cursors